I chose this purely because it’s fun to say. Go on, give it a go. Nice, right?
A whiffler is someone who constantly changes their mind or opinion – one who whiffles. Etymology-wise, it’s onomatopoeic, which might be why it’s so nice to say. It’s named for the sound the wind makes. Aw.
There are actually loads of definitions of the verb ‘to whiffle’ – so many in fact that I’m amazed it’s not still in general use. If you’ve got some time on your hands you can find out what they are on Wikipedia (and also more about the game Whiffleball. That’s really a thing). Oh, and there’s also a Wetherspoon’s pub in Norwich called The Whiffler. When I googled it I found this gem in the Q&A section, apparently from former Bond actor Roger Moore:
